This is actually pretty rare in ???68, it seems. 8/21 was one example, where the Dead stopped to tune up in the Cryptical reprise. (It???s amazing there wasn???t more tuning in ???68, actually, given the Dead???s later habits.) But the Eleven is the principal culprit ??? on both 12/7 and 12/20, the Eleven ends awkwardly, sort of fading out due to problems onstage.